Android 13 监控网络连接状态

Android 13 监控网络连接状态

获取瞬时状态

val cm = context.applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
val currentNetwork = cm.activeNetwork
if (currentNetwork != null) {
    val caps = cm.getNetworkCapabilities(currentNetwork)
    val linkProperties = cm.getLinkProperties(currentNetwork)
}

监听网络事件

将 NetworkCallback 类与 ConnectivityManager.registerDefaultNetworkCallback(NetworkCallback) 及 ConnectivityManager.registerNetworkCallback(NetworkCallback) 结合使用。

val cm = context.applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
cm.registerDefaultNetworkCallback(object : ConnectivityManager.NetworkCallback() {
    override fun onAvailable(network: Network) {
        Log.e(TAG, "The default network is now: " + network)
    }

    override fun onLost(network: Network) {
        Log.e(TAG, "The application no longer has a default network. The last default network was " + network)
        handle(null)
    }

    override fun onCapabilitiesChanged(
        network: Network,
        networkCapabilities: NetworkCapabilities
    ) {
        Log.d(TAG, "The default network changed capabilities: " + networkCapabilities)
        handle(networkCapabilities)
    }

    override fun onLinkPropertiesChanged(network: Network, linkProperties: LinkProperties) {
        Log.i(TAG, "The default network changed link properties: " + linkProperties)
    }
})

解析NetworkCapabilities的网络状态信息

 private fun handle(caps: NetworkCapabilities?) {
    if (caps != null) {
        if (caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)) {
            if (
                caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) ||
                caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI_AWARE)
            ) {
                setResult(STATE_WIFI)
                return
            } else if (
                caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) ||
                caps.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)
            ) {
                setResult(STATE_MOBILE)
                return
            }
        }
    }
    setResult(STATE_UNKNOWN)
    return
}